Office



C. W. ROYCE.

SPINNING' 0R DRAWING ROLL.

APPLICATION FILED Nov. e. IQIa.

1,324,622. Patented Deo. 9,1919.

f' GFFICE.'

SPINNING OR DRAWING ROLL.

Specification of Letters Patent.'

Patented Dec. 9), 1919.

Application led November 6, 1918. Serial No. 261,320,

To all whom t may concern.'

Be it known that I, CHARLES W. ROYCE, ka citizen of the United States, residing at Providence, in the county of Providence, State of Rhode Island, Ahave invented certain new and useful Improvements in Spinning or Drawing Rolls, of which the following is a specification.

My invention relates to improvements in drawingor spinning-rolls and particularly to the method of covering the same. The object of the improvement is to provide a resilient covering for the metal core of the roll which will hold theouter, leather cot more securely in place thereon to prevent slippage; and 'which will also have a more even and level surface so that when the cot` is applied over it, the outer periphery or working face of the roll will be smooth and true. Further objects of the improvement are to prevent disintegration or powdering of the surface ofthe roll-covering; to render it oiland water-proof; and to otherwise enhance its efliciency and increase its durability in use.

The manner and means for carrying out the improvement are fully described in the following specification, illustrated by the accompanying drawings, in which like reference characters designate like parts. In the drawings Figure l is a view of a usual type of toproll for spinningor drawing-frames, illustrating my improved covering applied thereto and showing it in section; A

Fig. 2, a perspective view of a roll shown with my improved covering applied to one of its bosses for comparison with the usual type of cloth-covering on the other boss, and illustrating both bosses .with the outer, leather cots removed;

Fig. 3, a perspective view of the leather cot by itself; and

Fig. 4, an enlarged, sectional View of my improved rollcovering illustrating the method of treating its surface whereby the advantageous results are secured.

Referring to the drawings, Fig. 1 illustrates a well known type of top-roll for spinningor drawing-frames, comprising the cylindrical hubs or bosses 2, 3, and the reduced end-trunnions 4. 4 by which it is mounted in its bearings. It is usual to construct these rolls from steel rods turned down to the proper diameter, and the peripheries of their bosses are covered with a resili- 'cushion for the surface of the roll.

ent material to provide the cushion for the working-face of the roll. The preferred method of covering the roll is to first apply a fabric strip 5, which is cemented to the periphery of the bosses 2 and 3, and over this is fitted a tubular, leather sleeve or envelop, see Fig. 3. The inner,fabric covering 5 provides the resilient cushion for the rol, while the outer, leather sleeve or cot gives a relatively smooth, wear-resisting surface as required for contact with the sliver or strands of yarn being operated upon.

A Leather has been found to be the most satisfactory material for the outer covering 7G of the roll, but heretofore it has been diliicult to hold the leather cots on the bosses without slipping while providing the required The usual practice is to employ an under covering of thick felt for the bosses, but this material is particularly susceptible to wear and soon loses its eiiiciency for holding the leather cot in place. In some cases the cots Vhave been glued or cemented to the under fabric covering, but when so fastened they can not be removed and replaced as they become worn. Furthermore, it has been found that after the glue or cement hardens it powders and disintegrates leaving the cot loose and unsecured. Vhen the cot is not held securely it chafes and abrades the surface of the under coveringor cushion which soon becomes humpy, ridged and uneven so that the outer surface of the cot also assumes an irregular conformation. Frequently the outer surface of the roll becomes concaved at the center with ridges and humps at other points so that it does not contact uniformly with the under rolls and hence will not function properly in the drawing operation. With these defects of the usual roll coverings in mind the object of theu present improvement is to provide a more vdurable and eiiicient under covering for the roll which will hold the outer leather cots more securely in place, while at the same time preto prevent it from slipping. rfhe fabric covering 5 is preferably treated in the piece before cutting it into strips for application to the rolls, and my improved process comn prises the following steps: Referring to Fig. 4, the fabric-covering 5 is here vshown in section, several times enlarged, and to its surface is first applied a Water-proof coating represented by the black stratum 7. |ihe Water-proof coatingmay be of any suitable compound, providing it has oil-resisting properties, and for this purpose I have obtained the best results with a solution of casein. Vlrfhis solution permeates into the body of the fabric and provides a base for the outer coating Which is in the nature of a drying-oil. Boiled fish-oil or linseed oil is preferable for the outer coating, although any other similar material may be used instead, provided it has oxygen-absorbing or air-drying properties. In Fig. 4, 8 desig nates the outer layer ofoil, and as soon as this coating is Ithoroughly dry the fabric is run through calendering-rolls to smooth and iron its surface. It will be understood that both the Water-proofing solution 7 and the outer oil-coating 8 permeate into the fabric and intermingle With the fibers thereof.

That is to say, the cloth is not merely coated over on its surface, but on the contrary is impregnated to a slight extent with the Water-proofing compound Which forms a layer or base on which the oil rests. The fibers appear on the lsurface of the cloth, but they are thoroughly amalgamated by the oily coating and are therefore prevented from roughing up or disintegrating. ln

this Way a firm, even surface is secured, and

at the same time this surface will have increased frictional-gripping quallties. Al-

4 though the oil-coating dries thoroughly and cannot be rubbed or scraped off, still it Will ric is applied to the roll Without treatment neas-,eea

or processing its surface will have a fuzzy, brous appearance as represented at 9 in Fig. 2. lWhen the cot 6 is slipped on over the covering 5, as illustrated in Fig. 1, it will lay smooth and level on the firm, even surface 8, see Fig. 4, and the tacky character of the coating acts to eectually hold it from slipping. When the cot fits the fabric-covering 5 snugly, as intended, it has been found that it is absolutely impossible to turn it on its boss and thus the desired result is attained. 1iVith my improved fabric-covering the cot is held absolutely from slipping and the even, level surface against which it rests maintains the outer eriphery or Working face of the roll uniflirmly smooth and true. For this reason the roll will be much more efiicient in use, resulting in a more even drawing of the sliver or yarn, and further'- more it will wear much longer under hard usage.

It is to be understood that l do not herein limit myself to theexact solutions specified for the treatment of the fabric, since other processes might be employed to obtain the same results. The essential feature of the treatment consists in first Water-proofing the fabric with a solution impenetrable by oil, and then applying the air-drying, oily, outer coating to amalgamate the fibers of the cloth and level its surface.

1. An improved resilient covering for spinningor drawing-rolls consisting in a strip of fabric having a layer of Water; and oil-proofing solution penetrating its body, and an overlying stratum -of oily compound forming the upper finishing coat and providing an even level surface of a slightly tacky nature with the fibers of the fabric left in their flocculent state.

2. A new and improved method of producing top-roll coverings consisting in treating a strip of fabric first With a penetrating Waterand oil-proofing solution, and then overlaying thesame with a stratum of air` drying Compound to provide a firm level i finishing coat of a slightly tacky nature while preserving the natural resiliency of the fabric.

In testimony whereof I aiflX my signature.

CHARLES W. RUYCE. 

